查询词典 methane

The impurities generating mechanism is explored and corresponding technical plan is provided for determining and diminishing the impurities including diphenyl methane, triphenylmethane, triphenylcarbinol, 4-methy benzophenone, 4-chloro benzophenone and etc. in order to produce high purity benzophenone.

利用化学技术、循环经济和产业生态学原理结合本生产工艺过程的特点确立包括碳循环、苯循环、工艺水循环、氯的回收循环等闭合循环技术组合，设计了光气即产即用技术、倾析分离技术、能量多级利用技术、蒸发—冷凝联用和多热源组合集成技术、二苯甲酮纯化技术等实用方案，实现经济地生产清洁的高纯度产品和生产过程废物零排放。

Seasonal variation of methane, water vapor, and nitrogen oxides near the tropopause: Satellite observations and model simulations

对流层顶附近的甲烷，水蒸气和氮氧化物的季节性变化：卫星观测和模式模拟

Methane as an important green house gas, its concentration in the global troposphere is increasing.

甲烷作为重要的温室气体，它在大气中的浓度正在增加。

Such fibers in unfermented beans end up being digested by bacteria in the human gut, which then release methane.

这些没有发酵过的豆类中的纤维因为细菌而在人体内被完全消化，释放出甲烷。

Has now assumed a number of national and international cooperation projects, which have completed a project of international cooperation in United Nations Industrial Development Organization support the "United Nations Chinese cities waste management policy and technology research assistance projects", the ongoing international cooperation Research projects are European Union support for the "Asian environmental projects - Mianyang City landfill methane recovery commercial use."

公司现已承担了多项国家和国际合作项目，其中已完成的国际合作项目有联合国工业发展组织支持的"联合国中国城市垃圾管理政策与技术研究援助项目"，正在进行的国际合作研究项目有欧盟支持的"亚洲环保计划—绵阳市垃圾填埋场沼气回收商业利用"。

The univalent hydrocarbon radical,CH3 -,derived from methane and occurring in many important organic compounds.

甲基单价碳氢基，CH3－，由甲烷中衍生出，在许多重要有机化合物中出现

The experiment also demonstrated that methane emission in the field with planted rice was 41.4 % higher than that of unplanted rice.

试验结果还表明，种植水稻明显增加了稻田甲烷排放量，与浸水稻田相比，植稻田甲烷排放量增加了41.4 %。

Uranian atmosphere, by composition, is 83% hydrogen, 15% helium and 2% methane although traces of other hydrocarbons have been found.

天王星大气的组成，是83％的氢，15％的氦和2％的甲烷等碳氢化合物虽然已发现的痕迹。

A group of amorphous CHN films were fabricated successfully by hollow cathode plasma chemical vapor deposition with ammonia, hydrogen and methane as reacting gas. The variation of deposition rate as a function of DC voltage and reactive gas flows were studied, respectively.

采用空心阴极等离子化学气相沉积方法，以NH3/H2的混合气体及CH4气体生物防治原料反应气体，成功地制备了非晶的CHN薄膜，研究了CHN薄膜的沉积速率与直流电压及反应气体流量的关系。

A group of amorphous CHN films were fabricated successfully by hollow cathode plasma chemical vapor deposition with ammonia,hydrogen and methane as reacting gas.The variation of deposition rate as a function of DC voltage and reactive gas flows were studied,respectively.

采用空心阴极等离子化学气相沉积方法，以NH3/H2的混合气体及CH4气体为原料反应气体，成功地制备了非晶的CHN薄膜，研究了CHN薄膜的沉积速率与直流电压及反应气体流量的关系。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。